Well... you're really not invited. And, by asking to be invited, you're adding one more to guest list, one person eating, etc. One more thing the host has to plan for. And, well, they may not mind!
But you're also pretty much telling them, "I don't trust that you've taken enough precautions to take care of my daughter."
If it a choice between asking and going to the party or your daughter not going, go ahead and ask. But be prepared for a "no".
Does your daughter have special needs?