SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5799da54781a58eebe297a28b6ec40d18fe2769b648833cfa805b15fb532d618' 
  AND token = 'kAgBgdQmZ4EW6Yy4c1hVxvFeL9cLSPG2/EUsMltqNOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}