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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '80066e1566759f2e5df287317ddaeec683bc30a4bc9d0121bce13bbe9d9bbabf' 
  AND token = '9qwpfIghcK9bcea+/Yh1XHtVeQFnYuJgkJin02LvU+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}