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 (
    94930, 94931, 94932, 94933, 94934, 94935, 
    94936, 94937, 94938, 94939, 94940, 
    94941, 94942, 94943, 94944, 94945, 
    94946, 94947, 94948, 94949, 95100, 
    95558, 95559, 95560, 95638, 95640, 
    95645, 95646, 95653, 95790, 95932, 
    95933, 95936, 95940, 96245, 96246, 
    96247, 96248, 96249, 96250, 96251, 
    96252, 96253, 96254, 96255, 96256, 
    96257, 96258, 96259, 96260, 96261, 
    96262, 96263, 96264, 96265, 96266, 
    96267, 96268, 96269, 96270, 96271, 
    96272, 96273, 96274, 96275, 96276, 
    96277, 96278, 96279, 96280, 96281, 
    96282, 96283, 96284, 96285, 96286, 
    96287, 96288, 96289, 96290, 96291, 
    96292, 96293, 96294, 96522, 96523, 
    96524, 96525, 96526, 96527, 96528, 
    96574, 96575, 96576, 96577, 96578
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00168

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 (94930,94931,94932,94933,94934,94935,94936,94937,94938,94939,94940,94941,94942,94943,94944,94945,94946,94947,94948,94949,95100,95558,95559,95560,95638,95640,95645,95646,95653,95790,95932,95933,95936,95940,96245,96246,96247,96248,96249,96250,96251,96252,96253,96254,96255,96256,96257,96258,96259,96260,96261,96262,96263,96264,96265,96266,96267,96268,96269,96270,96271,96272,96273,96274,96275,96276,96277,96278,96279,96280,96281,96282,96283,96284,96285,96286,96287,96288,96289,96290,96291,96292,96293,96294,96522,96523,96524,96525,96526,96527,96528,96574,96575,96576,96577,96578)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}