Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '961df4ba462fbf254cb648a2716b7346729359799ef94bab48c3d7bdb4cb5be6' 
  AND token = 'D+/DK33/XkuIv2rcW/EtJqM40WqI7FoQOM3tURldc40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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