Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30401f0c26f1270aa567b327f77c8a623acc9b7d95cb56ee18474f4ebb1801fc' 
  AND token = 'iqI7uuoX3WDY/uYkoOynDfTiz/6MdM50LHOpi8SCUaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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