Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa0bb77846e60f6b8ab976a6bf6e5ecc58a68e35dda02e902705f08e6c4550c9' 
  AND token = 'ZX/8C8t9RTZc13u1xc+1tslD/04IsnqC0UfXEJzFZF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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