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 (
    98215, 98216, 98217, 98218, 98219, 98220, 
    98221, 98222, 98223, 98258, 98259, 
    98260, 98261, 98262, 98263, 98264, 
    98265, 98266, 98267, 98268, 98269, 
    98270, 98271, 98272, 98273, 98290, 
    98291, 98292, 98293, 98294, 98295, 
    98296, 98297, 98298, 98299, 98300, 
    98301, 98302, 98303, 98304, 98305, 
    98306, 98307, 98308, 98309, 98310, 
    98311, 98312, 98313, 98322, 98323, 
    98391, 98392, 98393, 98394, 98395, 
    98396, 98397, 98398, 98399, 98400, 
    98401, 98402, 98403, 98404, 98405, 
    98406, 98411, 98412, 98413, 98421, 
    98422, 98424, 98425, 98426, 98427, 
    98428, 98429, 98432, 98433, 98434, 
    98435, 98436, 98437, 98438, 98439, 
    98440, 98441, 98442, 98443, 98446, 
    98447, 98449, 98450, 98451, 98452
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00058

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 (98215,98216,98217,98218,98219,98220,98221,98222,98223,98258,98259,98260,98261,98262,98263,98264,98265,98266,98267,98268,98269,98270,98271,98272,98273,98290,98291,98292,98293,98294,98295,98296,98297,98298,98299,98300,98301,98302,98303,98304,98305,98306,98307,98308,98309,98310,98311,98312,98313,98322,98323,98391,98392,98393,98394,98395,98396,98397,98398,98399,98400,98401,98402,98403,98404,98405,98406,98411,98412,98413,98421,98422,98424,98425,98426,98427,98428,98429,98432,98433,98434,98435,98436,98437,98438,98439,98440,98441,98442,98443,98446,98447,98449,98450,98451,98452)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}