You can set up alerts and be notified of articles that meet your criteria as the articles are published. Many databases offer alert services. Many journals offer free article alerts based on the appearance of your key words in the newly published article's title. Most journals do not require a subscription in order to use the alerts service. For more information, visit the journal's website.
Many journals offer free Table of Contents services. Receive the table of contents as each issue is published. Most journals do not require a subscription in order to use the table of contents service. IngentaConnect (below link) and JournalTOCs (below link) offer table of contents services for hundreds of journals. For other journals, visit the journal's website.