Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bf0dc4f72810fe818e7a5c85db6feef80399839395a1e9fd41d1b625a42a5da' 
  AND token = 'd52CjIzCcGbOJRDLG0A5M7cvdK3hN9cBjUzsWHOIo4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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