Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4ab13faf8d1e64b1393af08045856847468fbf68e69f9b9087984cfb111d55a' 
  AND token = '+iFJf/btjZdryDC+0+NokwXhJtliDJYyjubREqz+TN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}