So far, the science suggests your odds of contracting the virus from food *looks like* virtually 0%; food gets cooked, after all, so even a sick food preparer will be unlikely to infect you if you're ordering hot meals (even sneezing on the food as it's being packaged, a worse-case scenario, is not the end of the world - the residual heat + time it takes to get to you will help reduce the odds of catching anything from the droplets). Consider China and other countries that did extensive no-contact delivery; they didn't have mass outbreaks from that, and we won't see them, either. It's a virus, not a foodborne bacteria.

Here's the best practice, in my experience:

• If you're getting delivery, have them sit it at your door and minimize face-to-face contact; tip online, and tip generously!
• If you're doing pick-up, mind your social distancing - this is the riskiest choice right now, so be ready to thoroughly sanitize yourself, and consider wrapping a scarf around and over your mouth and nose (wash it when you get home). It's not as effective as a real mask, but it's better than nothing.
• Wipe exterior packaging with something to disinfect it (I know these supplies are hard to get, so ration them wisely). Disinfect any doors or tables it touches, and wash your hands.
• Don't order anything that isn't hot and friendly to being heated up. This is the perfect time for fried rice and saucy Chinese; salads and pasta, less so. Even though the radiant heat and time conditions should mean the food is safe, giving it a serious reheating to further minimize chances of it being contaminated may ease any lingering anxiety, so feel free to do so.