Yes. Document expiration is optional and can be switched off for any individual document.
Before you begin: This article assumes you're already in the document editor. If you haven't created a document yet, see Creating and Editing Documents.
Turning Off Document Expiration
Open the document and click the Settings icon in the right-hand panel.

Under Manage your document settings, go to Expiration Settings.

Toggle Document Expiration off to remove the expiry date entirely.
