Mix your graham cracker crumbs, melted butter, and granulated sugar in a bowl until the texture resembles wet sand. Press this mixture firmly into the bottom of a 9-inch springform pan, packing it down with the bottom of a measuring cup. I press for about 2 minutes to make sure the crust stays together when you cut it.
Beat the softened cream cheese with powdered sugar until completely smooth, around 2 minutes on medium speed. This step matters because lumpy cream cheese will show up in your final dessert. Stop and scrape down the bowl halfway through mixing.
Pour in your lemon juice, vanilla bean paste, and lemon zest while the mixer's still running. Mix for about 30 seconds until everything's combined and the filling smells incredible. Honestly, your kitchen's gonna smell like a lemon dream at this point.
In a separate bowl, whip your heavy cream until soft peaks form, which takes about 2 minutes. You want it fluffy but not over-whipped or you'll end up with butter accidentally happening. Fold this whipped cream gently into your lemon mixture using a rubber spatula.
Swirl in your lemon curd and honey with just a few folds—don't fully blend it because you want those gorgeous ripples showing through. Pour this filling over your crust and smooth the top gently. Now here's where patience kicks in: cover the pan with plastic wrap and refrigerate for at least 4 hours (overnight is even better).
Before serving, top your no bake lemon icebox cake cozy with chopped pistachios and any extra lemon zest you want. Let it sit at room temperature for 5 minutes so it's not ice-cold, which actually dulls the flavor a little bit.