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 (
    82632, 83529, 87294, 87295, 85103, 86131, 
    86154, 86639, 86708, 85850, 85851, 
    85860, 85861, 85089, 85175, 85221, 
    85267, 85100, 83558, 83563, 85061, 
    85147, 85193, 85239, 87314, 87315, 
    87326, 87327, 87338, 87339, 87350, 
    87351, 89769, 85129, 86132, 86155, 
    86640, 86709, 86175, 86176, 86198, 
    86199, 85101, 85840, 85841, 87302, 
    87303, 85087, 85173, 85219, 85265, 
    86173, 86174, 86196, 86197, 82834, 
    82836, 82907, 82909, 82980, 82982, 
    83394, 83396, 83404, 83406, 85127, 
    86514, 86515, 86790, 86791, 85059, 
    85145, 85191, 85237, 82831, 82904, 
    82977, 83391, 83401, 89808, 89810, 
    89860, 89862, 89932, 89934, 91498, 
    91500, 86129, 86130, 86152, 86153, 
    85099, 85296, 85298, 85393, 85395
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00172

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 (82632,83529,87294,87295,85103,86131,86154,86639,86708,85850,85851,85860,85861,85089,85175,85221,85267,85100,83558,83563,85061,85147,85193,85239,87314,87315,87326,87327,87338,87339,87350,87351,89769,85129,86132,86155,86640,86709,86175,86176,86198,86199,85101,85840,85841,87302,87303,85087,85173,85219,85265,86173,86174,86196,86197,82834,82836,82907,82909,82980,82982,83394,83396,83404,83406,85127,86514,86515,86790,86791,85059,85145,85191,85237,82831,82904,82977,83391,83401,89808,89810,89860,89862,89932,89934,91498,91500,86129,86130,86152,86153,85099,85296,85298,85393,85395)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}