Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '551d78c647978afdccfa5d4e99544b6d015d24d7693af144dc1b14551463765b' 
  AND token = 'wjcU9Syru8R143Wg+l1p0h7ZLzvsoaOPE0TxZcWG910=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00812

JSON explain

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