Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c230235c07c0bc1d4bad0f0a7659f86eeee10b7b71c9cb927f3b244a2e5ccdf' 
  AND token = 'srHlFS8QCzeU6QgMFwrJMG3KLtKCzOVg6LzRsHo63aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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