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 (
    17198, 17199, 17200, 17201, 17202, 17203, 
    17204, 17205, 17206, 17207, 17208, 
    17209, 17210, 17211, 17212, 17213
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00100

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 (17198,17199,17200,17201,17202,17203,17204,17205,17206,17207,17208,17209,17210,17211,17212,17213) and cscart_product_descriptions.lang_code = 'ru'"
    }
  }
}

Result

product_id short_description full_description unit_name
17198 Connector - Windshield Washer<p>Part number 9851621100</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17199 Film - rear door anti-chipping, left<p>Part number 87539G9000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17200 Film - rear door anti-chipping, right<p>Part number 87549G9000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17201 Emblem-G70<p>Part number 86310G9500</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17202 Emblem-AWD<p>Part number 86316G9500</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17203 Emblem-GENESIS<p>Part number 86311G9500</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17204 screw-tapping<p>Part number 1244105167B</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17205 screw-tapping<p>Part number 1244205207B</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17206 screw-tapping<p>Part number 1244206257B</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17207 Tapping screw - flange head<p>Part number 1249305167E</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17208 screw-tapping<p>Part number 1249204166B</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17209 screw-tapping<p>Part number 1249304147E</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17210 screw-tapping<p>Part number 1249305163</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17211 End piece, left<p>Part number 86547G9500</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17212 End piece, right<p>Part number 86548G9500</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
17213 Retainer-cowl top cover mounting<p>Part number 1420407000B</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>