Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1d9c0a5b47726b7e07f3268fc29b1eb4c758f2a67b30adab8165f18c5066f68a' 
  AND token = 'hixiUgVC6MiHHQBIgMAzDhNUCnKfHdpC8eVCZOBlA8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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