Preheat oven to 275 degrees.Place the butter in a 9x13 pan and place it in the oven to melt the butter.While the butter is melting, mix the Chex, peanuts, pretzels, and Goldfish in a large bowl.Once the butter is melted, remove the pan from the oven and add Worcestershire, seasoned salt, garlic powder, and onion powder to the butter. Mix all the ingredients in the pan until well combined.Add the cereal mixture to the pan and stir well to make sure all pieces get covered with the seasoned butter.Bake for 1 hour, stirring every 15 minutes until done.