Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7edd7ddeb32315a8a350572ba51695c447ded88d8a81f0f1471168b9689252f1' 
  AND token = 'vQNDS9ToHgB+Nm2p7P6y4ihzqADzBC8EzjqQQliIT4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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