Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5f1971097e9262e059e1b667aa699267715f47d968bbd2af298b882b586e8b9' 
  AND token = 'frzXEThB3L3NMrg5hoO+XT7Y7STdQL/b8vtzSv4xzJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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