Do not pour boiling water on your pinkie...
Patience grasshopper...
Tissue/ Mouse meat will start "cooking" at at about 160 degrees fahrenheit (71. celcius) +/-.
Boiling water is 212 degrees farenheit, give it a minute or two and one has rare to med rare pinkie at that point in time. imho.
Steeping in boiling water is how you make mousee tea
The idea is to rapidly, but not to rapidly, go from frozen to quickly thawed and to be warmed up to a approximate a living mouses temperature without cooking the tissue i.e. Fresh thawed, "raw", slightly warmed, sushi mice.
Slow room temperature thawing is probably improper technique as you are dealing with raw meat, slow eventual thawing promotes bacterial growth if present on/in the thawing body.
Thawing rapidly in warmish, not hottish
water in a water tight (freezer) bag in a cup is probably the ideal method for a pink or two.
With just one snake, its tough to buy pinks in quantity mail order and use up a couple hundred before they go bad, get frost bitten on ya.
You just better get more snakes to feed, I reckon.
I would suggest getting a pair of mice and make your own pinkies to freeze, save and serve to order...
That would be the cheapest and freshest way to go. A consistent supply and you get to feed quality, plump and healthy, homegrown pinks to your Corn Snake.
Otherwise find a buddy to order online express with and split the order & shipping maybe.
I think rodent pro is like 72 dollars U.S. for two hundred pinks delivered with the insulated box, dry ice and the actual shipping.
When ordering in a hundred pinky mice all by there lonesome, the shipping will actually cost more than the pinkies will.
Join your local Herpetological club, and attend meetings, the room is full of people who raise mice and have extra frozen pinks at a good price. Just ask around.