Its going to be like those Champion the Wonder horse/ The Rocketeer flick..In real life, yes. In Hollywoodland, esp. in the world of Star Wars, no. Besides any kind of tech/deus ex machina solutions to keep her alive there's things like rabbit holes, hiding behind a table, all manners of ways she could have survived that blast. Besides. I seem to recall a distinct pause between the time the droid was chasing after the Pylkes with their ice cream maker and when they cut to the outside and the bomb exploded. Enough time, in my opinion, for Garsa to have plausibly done something to have protected at least herself.
We get to see it again but also completely differently.
Garsa pulled one of her guests infront of her as a shield!
Probably..