Min temp for botulism growth is 3.3° C, and at this temperature growth is very, very slow. Botulism is anaerobic as well, so any oxygen in the package will prevent its growth.
At 8°C, a temperature to which chilled foods are often exposed during and after retail sale, nonproteolytic strains of C. botulinum can produce toxin within 3 weeks.
Source: https://pubmed.ncbi.nlm.nih.gov/31018272/
There are around a dozen cases of botulism per year in the US, usually from eating canned goods that are well past their best before date, or from improperly processed canned goods that did not reach a high enough temperature for long enough to kill bacteria.