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 (
    97348, 97349, 97350, 97351, 97352, 97353, 
    97354, 97355, 97356, 97357, 97358, 
    97359, 97360, 97361, 97362, 97363, 
    97364, 97365, 97366, 97367, 97368, 
    97369, 97370, 97371, 97372, 97373, 
    97374, 97375, 97376, 97377, 97378, 
    97379, 97380, 97381, 97382, 97383, 
    97384, 97385, 97386, 97387, 97388, 
    97389, 97390, 97391, 97392, 97393, 
    97394, 97395, 97396, 97397, 97398, 
    97399, 97400, 97401, 97402, 97403, 
    97404, 97405, 97406, 97407, 97408, 
    97409, 97410, 97411, 97412, 97413, 
    97414, 97415, 97416, 97417, 97418, 
    97419, 97420, 97421, 97422, 97423, 
    97424, 97425, 97506, 97507, 97508, 
    97509, 97510, 97511, 97512, 97513, 
    97514, 97515, 97516, 97517, 97518, 
    97519, 97520, 97521, 97522, 97523
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00167

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 (97348,97349,97350,97351,97352,97353,97354,97355,97356,97357,97358,97359,97360,97361,97362,97363,97364,97365,97366,97367,97368,97369,97370,97371,97372,97373,97374,97375,97376,97377,97378,97379,97380,97381,97382,97383,97384,97385,97386,97387,97388,97389,97390,97391,97392,97393,97394,97395,97396,97397,97398,97399,97400,97401,97402,97403,97404,97405,97406,97407,97408,97409,97410,97411,97412,97413,97414,97415,97416,97417,97418,97419,97420,97421,97422,97423,97424,97425,97506,97507,97508,97509,97510,97511,97512,97513,97514,97515,97516,97517,97518,97519,97520,97521,97522,97523)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}