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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    25351, 25352, 25353, 25354, 25355, 25356, 
    25357, 25358, 25359, 25564, 25565, 
    25566, 25567, 25568, 25569, 25570
  ) 
  AND cscart_product_descriptions.lang_code = 'ko'

Query time 0.00169

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id", "idx_product_lang"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 16,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (25351,25352,25353,25354,25355,25356,25357,25358,25359,25564,25565,25566,25567,25568,25569,25570) and cscart_product_descriptions.lang_code = 'ko'"
    }
  }
}

Result

product_id short_description full_description unit_name
25351 Wiring assembly - low voltage direct current converter (-)<p>Part number 91661CU010</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25352 BOLT<p>Part number 1140412256K</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25353 BOLT<p>Part number 1140412456K</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25354 bolt-guide<p>Part number 1012414156KA</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25355 Bracket assembly-motor mounting, rear<p>Part number 218G0CU000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25356 Bracket assembly-motor mounting rear, left<p>Part number 218C0CU000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25357 Bracket assembly - motor mounting, right<p>Part number 218A0CU000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25358 Bracket assembly - motor mounting, right<p>Part number 217A0CU000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25359 BOLT-FLANGE<p>Part number 5511707000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25564 Bolt-hexagon socket head<p>Part number 1170305161</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25565 gasket<p>Part number 1751214000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25566 Bracket assembly-motor mounting rear, left<p>Part number 217C0GI000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25567 Cover-motor sound iso option, front<p>Part number 365411XAB0</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25568 Cover-motor sound iso option, rear<p>Part number 365421XAB0</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25569 Cover-motor sound option, lower<p>Part number 365461XAB0</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25570 Tube assembly - feed<p>Part number 365641XAB0</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>