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 (
    97195, 97196, 97197, 97198, 97199, 97200, 
    97201, 97202, 97203, 97204, 97205, 
    97206, 97207, 97208, 97209, 97210, 
    97211, 97212, 97213, 97214, 97215, 
    97216, 97217, 97218, 97228, 97229, 
    97230, 97231, 97232, 97233, 97234, 
    97235, 97236, 97237, 97238, 97239, 
    97240, 97241, 97242, 97243, 97244, 
    97245, 97246, 97247, 97248, 97249, 
    97250, 97251
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00095

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "25.69"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "20.89",
        "eval_cost": "4.80",
        "prefix_cost": "25.69",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (97195,97196,97197,97198,97199,97200,97201,97202,97203,97204,97205,97206,97207,97208,97209,97210,97211,97212,97213,97214,97215,97216,97217,97218,97228,97229,97230,97231,97232,97233,97234,97235,97236,97237,97238,97239,97240,97241,97242,97243,97244,97245,97246,97247,97248,97249,97250,97251)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}