Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1945eb0be8445e8ea7c6bbe261f6d20d478dd70b217f89c79a8693e563e6ca19' 
  AND token = 'EjC/X11Bwv0Hx27myfhKe+4yb6cxWQZdXQVjvuzCHZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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