Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a88e92e62449f71768c53b2654ccc98dff27f9d11235590bcb58268f162a1524' 
  AND token = 'iUx6/AjkTtnMFPm8fiLo7Dawa9UNOSxlkoMJ1hGxtjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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