Liberally coat a 3-quart or larger slow cooker with cooking spray. Add the corn, broth, rice, crema, butter, salt, and pepper and stir until well combined. Cover and cook on the HIGH setting for 2 hours.
Check the rice for doneness. If the rice is not tender, reduce the setting to low and cook for 30 minutes more.
Drizzle with the lime juice and fluff the rice with a fork. Garnish with the queso fresco, sprinkle with ancho chile powder, and serve warm.
