Is AES practically unbreakable? Is brute force attack practical on AES?
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Besides the question linked above (of which this is a duplicate), the following AES-related Q&A might be interesting for you to read: Is AES-256 a post-quantum secure cipher or not? – e-sushi May 19 '18 at 09:40
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A brute force attack on a randomly chosen AES key is impractical for the foreseeable future. With quantum computing some experts expect that a 128-bit key could be broken in our lifetime, but not a 256-bit key.
That said, plenty of systems using AES have been broken--using a secure block cipher does not magically make your system secure.
