SELECT 
  lang.name, 
  lang.value 
FROM 
  cscart_language_values lang 
WHERE 
  lang.lang_code = 'ja' 
  AND lang.name IN (
    'no_products_selected', 'all_features', 
    'all_features', 'similar_only', 
    'similar_only', 'different_only', 
    'different_only', 'clear_list', 
    'add_feature', 'add', 'compare', 
    'no_products_selected', 'all_features', 
    'all_features', 'similar_only', 
    'similar_only', 'different_only', 
    'different_only', 'clear_list', 
    'add_feature', 'add', 'compare'
  )

Query time 0.00084

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "lang",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "392",
      "used_key_parts": ["lang_code", "name"],
      "rows": 8,
      "filtered": 100,
      "index_condition": "lang.lang_code = 'ja' and lang.`name` in ('no_products_selected','all_features','all_features','similar_only','similar_only','different_only','different_only','clear_list','add_feature','add','compare','no_products_selected','all_features','all_features','similar_only','similar_only','different_only','different_only','clear_list','add_feature','add','compare')"
    }
  }
}