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 (
    96953, 96954, 96955, 96956, 96957, 96958, 
    96959, 96960, 96961, 96962, 96963, 
    96964, 96965, 96966, 96967, 96968, 
    96969, 96970, 96971, 96972, 96973, 
    96974, 96975, 96976, 96977, 96978, 
    96979, 96980, 96981, 96982, 96983, 
    96984, 96998, 98192, 98193, 98194, 
    98195, 98196, 98197, 98198, 98199, 
    98208, 98209, 98210, 98211, 98212, 
    98213, 98214, 98215, 98216, 98217, 
    98218, 98219, 98220, 98221, 98222, 
    98223, 98322, 98323, 98482, 98509, 
    98510, 98511, 98512, 98513, 98514, 
    98516, 98517, 98518, 98519, 98520, 
    98538, 98539, 98540, 98541, 98542, 
    98543, 98544, 98545, 98546, 98547, 
    98548, 98549, 98563, 98564, 98565, 
    98566, 98567, 98568, 98569, 98758, 
    98889, 98890, 98891, 98892, 98893
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00171

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "43.24"
    },
    "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": 96,
      "rows_produced_per_join": 96,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "33.64",
        "eval_cost": "9.60",
        "prefix_cost": "43.24",
        "data_read_per_join": "366K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (96953,96954,96955,96956,96957,96958,96959,96960,96961,96962,96963,96964,96965,96966,96967,96968,96969,96970,96971,96972,96973,96974,96975,96976,96977,96978,96979,96980,96981,96982,96983,96984,96998,98192,98193,98194,98195,98196,98197,98198,98199,98208,98209,98210,98211,98212,98213,98214,98215,98216,98217,98218,98219,98220,98221,98222,98223,98322,98323,98482,98509,98510,98511,98512,98513,98514,98516,98517,98518,98519,98520,98538,98539,98540,98541,98542,98543,98544,98545,98546,98547,98548,98549,98563,98564,98565,98566,98567,98568,98569,98758,98889,98890,98891,98892,98893)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}