Using CRSF, AJAX form posts, with a CDN
I don't think you can cache that, since the tag is run server-side and rendered with template output, and will be unique on every page load. If you have content that's unique on every page load, you'd have to either ignore that page from CDN caching, or dynamically load in the unique content after page load via an AJAX call to a page that is ignored from CDN caching.