Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54e3bf19d89c70e098ae83a6a3e0de5f93f2514091ec56969355a392aeb8942d' 
  AND token = 'Xu7z6B/Roa2py+1ATJ7272MdRb0588+pWNiDlYGRlmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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