SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'e9674d93ed499d55a739ca3da50337e8285f17522cf1aed687fd4b2b705a2e5e' 
  AND token = 'm32ziE5pDGquAn+SpmVjsgxQPSGsY8FWp/QjisYtTlg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01050

JSON explain

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