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 (
    94496, 94497, 94498, 94499, 94500, 94501, 
    94502, 94503, 94505, 94506, 94507, 
    94508, 94509, 94510, 94511, 94512, 
    94513, 94514, 94515, 94516, 94517, 
    94518, 94519, 94520, 94521, 94522, 
    94523, 94524, 94525, 94526, 94527, 
    94528, 94529, 94530, 94531, 94532, 
    94533, 94534, 94535, 94536, 94537, 
    94538, 94539, 94540, 94541, 94542, 
    94543, 94544, 94545, 94546, 94547, 
    94548, 94549, 94550, 94551, 94552, 
    94553, 94554, 94555, 94556, 94557, 
    94558, 94559, 94560, 94561, 94562, 
    94563, 94564, 94565, 94566, 94567, 
    94568, 94569, 94570, 94571, 94572, 
    94573, 94574, 94575, 94576, 94577, 
    94578, 94579, 94580, 94581, 94582, 
    94583, 94584, 94585, 94586, 94587, 
    94588, 94827, 94828, 94829, 94830
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00075

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 (94496,94497,94498,94499,94500,94501,94502,94503,94505,94506,94507,94508,94509,94510,94511,94512,94513,94514,94515,94516,94517,94518,94519,94520,94521,94522,94523,94524,94525,94526,94527,94528,94529,94530,94531,94532,94533,94534,94535,94536,94537,94538,94539,94540,94541,94542,94543,94544,94545,94546,94547,94548,94549,94550,94551,94552,94553,94554,94555,94556,94557,94558,94559,94560,94561,94562,94563,94564,94565,94566,94567,94568,94569,94570,94571,94572,94573,94574,94575,94576,94577,94578,94579,94580,94581,94582,94583,94584,94585,94586,94587,94588,94827,94828,94829,94830)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}