SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10613, 10612, 10611, 15515, 15516, 18081, 
    18082, 18083, 10002, 7503, 10610, 10609, 
    10608, 10607, 11908, 18086, 18087, 
    10007, 10063, 10062, 10064, 9997, 10000, 
    9999
  )

Query time 0.00107

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,
      "index_condition": "cscart_products.product_id in (10613,10612,10611,15515,15516,18081,18082,18083,10002,7503,10610,10609,10608,10607,11908,18086,18087,10007,10063,10062,10064,9997,10000,9999)"
    }
  }
}