Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'f20801d642bb548309e5b5f6010eae3a50ae3dc491e8d501a32209b8d06b09ad' 
  AND token = 'JOdm/lpRg89aZcbqhBOnAjz4xZAWJ7sI9lHfk7/Y0ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00783

JSON explain

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