There’s a way which allows you to insert a normal link, but unfortunately this doesn’t work with CTAs. If you’re using the new drag and drop editor, the button module looks like a CTA and it should work.
Set the destination of the link to “{{unsubscribe_link}}”. This token will expand to the correct link for the recipient of the email at send time and doesn’t rely on any cookies. It works the same way as the link in the footer which just looks like:
<a href=“{{unsubscribe_link}}”>Unsubscribe</a>