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 (
    98282, 98283, 98284, 98285, 98286, 98287, 
    98288, 98289, 98290, 98291, 98292, 
    98293, 98294, 98295, 98296, 98297, 
    98298, 98299, 98300, 98301, 98302, 
    98303, 98304, 98305, 98306, 98307, 
    98308, 98309, 98310, 98311, 98312, 
    98313, 98314, 98315, 98316, 98317, 
    98318, 98319, 98320, 98321, 98482, 
    98572, 98573, 98574, 98575, 98576, 
    98577, 98578, 98579, 98580, 98581, 
    98582, 98583, 98584, 98585, 98586, 
    98687, 98688, 98689, 98690, 98691, 
    98692, 98693, 98694, 98695, 98696, 
    98697, 98698, 98699, 98700, 98701, 
    98702, 98703, 98704, 98705, 98706, 
    98707, 98708, 98709, 98710, 98711, 
    98712, 98713, 98714, 98715, 98738, 
    98739, 98740, 98741, 98742, 98743, 
    98744, 98745, 98746, 98747, 98748
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00157

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 (98282,98283,98284,98285,98286,98287,98288,98289,98290,98291,98292,98293,98294,98295,98296,98297,98298,98299,98300,98301,98302,98303,98304,98305,98306,98307,98308,98309,98310,98311,98312,98313,98314,98315,98316,98317,98318,98319,98320,98321,98482,98572,98573,98574,98575,98576,98577,98578,98579,98580,98581,98582,98583,98584,98585,98586,98687,98688,98689,98690,98691,98692,98693,98694,98695,98696,98697,98698,98699,98700,98701,98702,98703,98704,98705,98706,98707,98708,98709,98710,98711,98712,98713,98714,98715,98738,98739,98740,98741,98742,98743,98744,98745,98746,98747,98748)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}