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SELECT 
  pf.feature_id, 
  pf.company_id, 
  pf.feature_type, 
  pf.parent_id, 
  pf.display_on_product, 
  pf.display_on_catalog, 
  pf.display_on_header, 
  cscart_product_features_descriptions.description, 
  cscart_product_features_descriptions.internal_name, 
  cscart_product_features_descriptions.lang_code, 
  cscart_product_features_descriptions.prefix, 
  cscart_product_features_descriptions.suffix, 
  pf.categories_path, 
  cscart_product_features_descriptions.full_description, 
  pf.status, 
  pf.comparison, 
  pf.position, 
  pf.purpose, 
  pf.feature_style, 
  pf.filter_style, 
  pf.feature_code, 
  pf.timestamp, 
  pf.updated_timestamp 
FROM 
  cscart_product_features AS pf 
  LEFT JOIN cscart_product_features_descriptions ON cscart_product_features_descriptions.feature_id = pf.feature_id 
  AND cscart_product_features_descriptions.lang_code = 'ja' 
WHERE 
  pf.feature_type = 'G' 
  AND (
    pf.feature_id IN (20, 24, 33, 30, 40, 37) 
    OR pf.feature_id NOT IN (
      SELECT 
        parent_id 
      FROM 
        cscart_product_features
    )
  ) 
  AND pf.display_on_product = 'Y' 
  AND (
    pf.categories_path = '' 
    OR ISNULL(pf.categories_path) 
    OR FIND_IN_SET(245, pf.categories_path) 
    OR FIND_IN_SET(248, pf.categories_path) 
    OR FIND_IN_SET(166, pf.categories_path) 
    OR FIND_IN_SET(254, pf.categories_path) 
    OR FIND_IN_SET(263, pf.categories_path) 
    OR FIND_IN_SET(255, pf.categories_path)
  ) 
ORDER BY 
  pf.position, 
  cscart_product_features_descriptions.description

Query time 0.00007

JSON explain

{
  "query_block": {
    "select_id": 1,
    "filesort": {
      "sort_key": "pf.position, cscart_product_features_descriptions.description",
      "temporary_table": {
        "table": {
          "table_name": "pf",
          "access_type": "ALL",
          "possible_keys": ["PRIMARY"],
          "rows": 35,
          "filtered": 100,
          "attached_condition": "pf.feature_type = 'G' and (pf.feature_id in (20,24,33,30,40,37) or !<in_optimizer>(pf.feature_id,pf.feature_id in (subquery#2))) and pf.display_on_product = 'Y' and (pf.categories_path = '' or pf.categories_path is null or find_in_set(245,pf.categories_path) or find_in_set(248,pf.categories_path) or find_in_set(166,pf.categories_path) or find_in_set(254,pf.categories_path) or find_in_set(263,pf.categories_path) or find_in_set(255,pf.categories_path))"
        },
        "table": {
          "table_name": "cscart_product_features_descriptions",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["feature_id", "lang_code"],
          "ref": ["smscrm_edev.pf.feature_id", "const"],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "trigcond(cscart_product_features_descriptions.lang_code = 'ja')"
        },
        "subqueries": [
          {
            "query_block": {
              "select_id": 2,
              "table": {
                "table_name": "cscart_product_features",
                "access_type": "ALL",
                "rows": 35,
                "filtered": 100
              }
            }
          }
        ]
      }
    }
  }
}

Result

feature_id	feature_type	display_on_product	display_on_catalog	display_on_header	description	internal_name	lang_code	categories_path	status	comparison	position
20	G	Y	Y	N	主要特長	主要特長	ja	248	A	N	10
24	G	Y	Y	N	仕様	仕様	ja	248	A	N	20
33	G	Y	Y	N	マルチメディア	マルチメディア	ja	248	A	N	30
30	G	Y	Y	N	インターフェイス	インターフェイス	ja	248	A	N	40
40	G	Y	Y	N	追加情報	追加情報	ja	248	A	N	50
37	G	Y	Y	N	寸法	寸法	ja	248	A	N	100