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 (
    96064, 96065, 96066, 96067, 96068, 96069, 
    96070, 96071, 96072, 96073, 96074, 
    96075, 96076, 96077, 96078, 96079, 
    96080, 96081, 96082, 96083, 96084, 
    96085, 96086, 96087, 96088, 96089, 
    96090, 96091, 96092, 96093, 96094, 
    96095, 96096, 96097, 96098, 96099, 
    96100, 96101, 96102, 96103, 96104, 
    96383, 96384, 96385, 96386, 96387, 
    96388, 96389, 96390, 96391, 96394, 
    96395, 96396, 96397, 96398, 96399, 
    96400, 96409, 96410, 96429, 96432, 
    96433, 96442, 96443, 96444, 96445, 
    96446, 96447, 96448, 96449, 96450, 
    96451, 96452, 96453, 96454, 96455, 
    96456, 96457, 96458, 96459, 96460, 
    96461, 96462, 96463, 96464, 96465, 
    96466, 96467, 96468, 96469, 96470, 
    96471, 96472, 96473, 96474, 98600
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00159

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 (96064,96065,96066,96067,96068,96069,96070,96071,96072,96073,96074,96075,96076,96077,96078,96079,96080,96081,96082,96083,96084,96085,96086,96087,96088,96089,96090,96091,96092,96093,96094,96095,96096,96097,96098,96099,96100,96101,96102,96103,96104,96383,96384,96385,96386,96387,96388,96389,96390,96391,96394,96395,96396,96397,96398,96399,96400,96409,96410,96429,96432,96433,96442,96443,96444,96445,96446,96447,96448,96449,96450,96451,96452,96453,96454,96455,96456,96457,96458,96459,96460,96461,96462,96463,96464,96465,96466,96467,96468,96469,96470,96471,96472,96473,96474,98600)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}