SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (192) 
  AND cscart_product_descriptions.lang_code = 'ja'

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "const",
      "possible_keys": ["PRIMARY", "product_id"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "ref": ["const", "const"],
      "rows": 1,
      "filtered": 100
    }
  }
}

Result

product_id short_description full_description
192 <p> 2011年夏にレニー・クラヴィッツが発表した通算9枚目のアルバム。<br /> 本人が作詞、全楽器の演奏、プロデュースを手がけたもので、独特のギター・リフや叙情性豊かなサウンドが際立つ仕上がりとなっている。「スタンド」ほかを収録。(CDジャーナル　データベースより) </p> <p> 収録内容:<br /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">1. Black And White America</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">2. Come On Get It</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">3. In The Black</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">4. Liquid Jesus</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">5. Rock Star City Life</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">6. Boongie Drop</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">7. Stand</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">8. Superlove</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">9. Everything</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">10. I Can&#39;t Be Without You</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">11. Looking Back On Love</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">12. Life Ain&#39;t Ever Been Better Than It Is Now</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">13. The Faith Of A Child</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">14. Sunflower</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">15. Dream</span><br style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #cac5c5; padding: 0px; margin: 0px;" /> <span style="color: #000000; font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 16px; text-align: left; background-color: #ffffff;">16. Push</span></p>