Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0e00c32b3c1ea2698c744762d61c1d64ce94970f01da69a93ba5509934eede2' 
  AND token = 'XU8rbHHWBKA/WKFVtJtIonJ5VOdA6kxVzTwYAfa9qCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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