SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    64919, 65011, 65034, 65055, 65068, 65121, 
    65106, 65019, 65051, 65063, 65111, 
    65047, 64999, 65527, 65675, 65677, 
    65676, 65799, 65797, 65812, 65821, 
    65802, 65819, 65809
  )

Query time 0.00084

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": 24,
      "filtered": 100,
      "attached_condition": "cscart_products.product_id in (64919,65011,65034,65055,65068,65121,65106,65019,65051,65063,65111,65047,64999,65527,65675,65677,65676,65799,65797,65812,65821,65802,65819,65809)"
    }
  }
}

Result