SELECT 
  cscart_products.*, 
  cscart_products.ebay_status, 
  cscart_products.ebay_template_id 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    22511, 22512, 22513, 22514, 22515, 22516, 
    22517, 22518, 22519, 22520, 22521, 
    22522, 22523, 22524, 22525, 22526
  )

Query time 0.00039

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": 16,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (22511,22512,22513,22514,22515,22516,22517,22518,22519,22520,22521,22522,22523,22524,22525,22526)"
    }
  }
}