Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf062feb177b343ebe5cb6e78551d4b3b1e45dd0777b20544cee7368f807ee59' 
  AND token = 'WXy0thlRzDH10uACY68+fuN33LWHbLyZV5axOrMPhRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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