Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d1a81f894b6d1280a43fff7dde57e87b220d05decf4419145ec9bb4e9a43794' 
  AND token = '9DB7jZwNqF4f82hLEBg16uHYutz/Oy42gYMI9ueZMeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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