As with most fried foods, shrimp toast is best enjoyed right away. The longer they sit in the refrigerator, the soggier they will become. However, you can store them in an air-tight container in the refrigerator for up to 3 days. Reheat them in a skillet on the stovetop, in the oven at a low temp (325), or in the air fryer using the reheat function.
You can prepare the shrimp toast a day ahead of time if needed. Prep the toast up until the point of frying, place them onto a baking tray, cover, and refrigerate. Fry right before serving.