There are two coupons available right now at that zip - one says redeemable at Walmart and the other says redeemable at Publix. Both are manufacturer's coupons so you can get several prints if you need them.
The boxes are on sale in the current Publix ad in case you want to grab some before the new sale starts.
Kellogg’s Pop Tarts, 8 ct, 13.5 to 15.2 oz, 3/$5
-$1/3 Kellogg's® Pop-Tarts® toaster pastries and/or mini crisps® (zip 33033)
You pay $1.33 per box.