Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e28941d2f422241b29e984b70c46376b1fa1344e1938a42b5656446bd6282e17' 
  AND token = '4LOfNoCdfr39u2X0iZ7fd9k8JFZf8D7tf5Nmb9Uob/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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