Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f4f8e7377e3df7030cdddc79a5eadbdfdf7bec70673f05f8e5bfb63481fed4' 
  AND token = '4TbKypMXzZh4zs9G1RZspGzf+g5+3UIVFhinK2+5do4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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