Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6244801d9baa167fceb8383bd7ee3a43a1e5372643588c9e100e9e78c4fe4a92' 
  AND token = 'nMeVRnbZ6hY7SK1qgk5SmhvRRgFtCI+lIsV0gaUl8o4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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