Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '945ba894470a2f52a56c9a6424f142139dbfb84b3f612da272ceecaa767a78ef' 
  AND token = 'IhQ3EMPsvVmvNvLUXxtbCGlL3Go4THX5+DQW82AlB1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00852

JSON explain

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