In the bowl of a stand-mixer fitted with the dough hook attachment, stir together the yeast, warm water, and sugar. Stir in the olive oil, then turn the mixer on low and gradually add in the flour and salt. Turn mixer up to medium and knead the dough until it comes together and forms a soft ball and pulls away from the sides of the bowl, adding more flour (1/4 cup at a time) if needed. Cover the bowl with a kitchen towel and allow the dough to rise two hours. Once risen, turn dough out gently onto a floured surface (you do not want to knead the dough here), and divide the dough in half. Press each half into a greased pizza pan, covering the pan and a little up the sides to form the crust. Top with desired toppings and bake in a 450 oven for around 15 minutes or until crust is firm and golden and center of pizza is cooked through.