In a small bowl combine crushed graham cracker crumbs and granulated sugar. Once evenly combined add melted butter to crumbs. Mix until a wet sand texture is formed. Press into the bottom and slightly up upsides of prepared pan. Bake for 5-8 minutes to set the crust.
Add the heavy cream, sour cream, vanilla beans, lemon zest, and vanilla extract- mixing until fully combined. Make sure to scrape the sides of the bowl with a rubber spatula to ensure everything is evenly combined.