Add the Graham crackers, sugar, and butter to a mixing bowl. Using a spatula, mix until they are well combined . Add the mixture to a 9 inch pie pan. Using a spatula , press it down and spread it out until a pie shell forms.
Bake the Graham crust pie shell in the oven for 12 to 14 minutes. Remove it and set it aside to cool.
Add the condensed milk, eggs, and key lime juice to a mixing bowl. Whisk until everything is well combined and the mixture thickens a little.
Pour the mixture into the pie shell. Put the key lime pie in the oven for an additional 15 minutes. Set it aside to cool a little and place it in the fridge to chill for 4 – 6 hours (overnight is better).