Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '509a7b20ff6ea63dc6718f40b73366ff0cf61a6089c147248c24fa764a7a8b86' 
  AND token = 'pp2mLgbc1jkkGir0vhGbbjfBdib8zd9ync3Z7/Zr7jo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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