Ran across this on the web:
How to chill a can of coke in under 2 minutes:
That would be about 20-25 minutes in a freezer. If you put [the can] in a bucket of ice, that would halve that time. If you put water in that ice, it’d be cold (+- 5c) enough to drink in about 4-6 minutes, if you put salt in that water, you’d reduce the chill time to just over 2 minutes. Agitating the can in the water, rolling it around, reduces the chill time even more.
The fastest possible way is to grab a CO2 fire extinguisher and unload that sucker on the can