I have been the editor of six journals , Indian and foreign. Hence I have some expertise to answer this question. The journals covered by Web of Science or Scopus are not rapid publication journals, because they are overloaded with articles. The articles the journals have are sufficient for publishing the journals for one year or more. If one article is received today by any one of these journals it will be in the queue and will go through the usual procedure of rejection/ if not then refereeing, revision of the article following referee's comments, editing, composing, proof reading, printing, binding, and dispatch. All these take time as a result rapid publication becomes a distant dream. Predatory journals not covered by Web of Science or Scopus may publish an article just within a week or ten days. For these they charge fees. E- journals take less time to publish. .
Medicinal Plants may be a journal of your choice. It is covered by Indian Science Abstracts and not by Scopus or Web of Science. You can go through Medicinal and Aromatic Plants Abstracts. This journal will give you an idea as to the journals publishing articles on your topic
If you already have the title and abstract for your article, you can use the following tools from Elsevier and Springer to help you pick a right journal among those that belong to the respective publisher
http://journalfinder.elsevier.com
http://journalsuggester.springer.com
The output of these tools shows inter alia average article processing times and impact factors of the journals and, if I recall correctly, also publication fees and open access fees.
In many journals you can publish free of charge if you do NOT make your article open access (i.e. it is available only to journal subscribers), but this should be checked for each journal separately.
Once you make a short list of potentially suitable journals, you can check whether they are covered by Scopus here