For the pie crust: Combine flour, salt and sugar in a large bowl. Cut in cold butter with a pastry cutter (or use your hands!) until crumbly. Stir in 4 tbsp ice water and mix with your hands until dough comes together in a ball, adding in additional ice water if necessary.
Form in a disc and wrap in plastic wrap and refrigerate for 1 hour or more.
Preheat oven to 350 degrees F. Roll out dough to roughly fit a rimmed baking sheet and bake for 12-15 minutes until golden brown. Set aside to cool.
Ice cream: Whip cream until stiff peaks form. Slowly fold in sweetened condensed milk and coconut extract until totally combined (being careful not to deflate the whipped cream). Crumble about ⅓-1/2 of the baked pie crust and stir into the ice cream mixture.
Pour into a ⅕-2qt container or loaf pan and sprinkle with additional crumbled pie crust and toasted coconut. Freeze for 5-6 hours or until firm, then cover with plastic wrap and keep frozen until serving with remaining pie crust.