Make the crust: Preheat oven to 325 degrees. Combine graham cracker crumbs and sugars. Pour melted butter over crumb mixture and combine. Spread evenly along the bottom and sides of a 9-inch pie pan, using the bottom of a glass or your fingers to press down. Bake for 10 minutes, then set aside to cool before adding filling.
Make the filling: Increase oven temperature to 350 degrees. In a mixing bowl, combine filling ingredients. Pour into cooled pie crust and bake for 12 minutes. Set aside to cool at room temperature for 15 minutes, then refrigerate.
Make the whipped cream: Whisk ingredients until your forearms hurt (and whipped cream holds its shape). Dollop onto pie and top with more lime zest.