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 (
    92255, 92256, 92257, 92496, 92497, 92498, 
    92499, 92254, 92512, 92520, 92522, 
    84280, 84285, 84288, 84954, 84048, 
    92515, 92516, 92519, 84278, 84279, 
    84283, 84284, 84287, 92510, 92517, 
    92521, 84956, 92550, 92509, 92511, 
    92518, 84047, 84277, 84282, 92514, 
    92549, 85010, 92542, 92543, 84273, 
    84275, 84955, 84276, 84281, 84286, 
    85011, 92513, 92545, 92546, 92547, 
    92544, 92548, 84272, 84274, 84046, 
    84049, 92541, 91372, 91374, 91371, 
    91373, 91370, 91381, 91383, 91369, 
    91368, 91339, 91344, 91379, 91382, 
    91384, 91351, 91353, 91367, 91338, 
    91343, 91377, 91380, 92489, 92490, 
    92491, 92492, 92493, 92494, 92495, 
    91349, 91352, 91354, 91336, 91341, 
    91378, 91347, 91333, 91350, 91337
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00183

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 (92255,92256,92257,92496,92497,92498,92499,92254,92512,92520,92522,84280,84285,84288,84954,84048,92515,92516,92519,84278,84279,84283,84284,84287,92510,92517,92521,84956,92550,92509,92511,92518,84047,84277,84282,92514,92549,85010,92542,92543,84273,84275,84955,84276,84281,84286,85011,92513,92545,92546,92547,92544,92548,84272,84274,84046,84049,92541,91372,91374,91371,91373,91370,91381,91383,91369,91368,91339,91344,91379,91382,91384,91351,91353,91367,91338,91343,91377,91380,92489,92490,92491,92492,92493,92494,92495,91349,91352,91354,91336,91341,91378,91347,91333,91350,91337)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}