Preheat your oven to 325°F (160°C).
In a bowl, combine graham cracker crumbs and melted butter; mix well.
Press the mixture into the bottom of a springform pan to form the crust.
Bake for 10 minutes, then let it cool.
In a mixing bowl, beat the cream cheese until smooth.
Add powdered sugar and mix until fully combined.
In another bowl, whip the heavy cream until soft peaks form.
Gently fold the whipped cream into the cream cheese mixture.
Add pistachio paste, vanilla extract, and salt; mix until smooth.
Pour the filling over the cooled crust; smooth the top.
Refrigerate for at least 4 hours or until set.
Garnish with chopped pistachios before serving.