SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    65853, 65864, 65877, 65874, 65863, 65869, 
    65868, 65862, 65850, 65880, 65852, 
    65855, 65854, 65866, 65857, 65876, 
    65858, 65856, 65860, 65859, 65861, 
    65967
  )

Query time 0.00073

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 22,
      "filtered": 100,
      "attached_condition": "cscart_products.product_id in (65853,65864,65877,65874,65863,65869,65868,65862,65850,65880,65852,65855,65854,65866,65857,65876,65858,65856,65860,65859,65861,65967)"
    }
  }
}

Result