Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2098c7333826d20f312181f0806bfb4b94b30086c7caf33345e70081ef29b730' 
  AND token = 'P1XZf9WcGEaNmSmgMwCrvNYVVDJQg0bNXbOnrNKDWIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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