Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_45039 ( "Year" real, "Competition" text, "Venue" text, "Position" text, "Event" text, "Time" text )

### Question ###
What's the lowest Year with a Venue of casablanca and has the Time of 20.63w?

### Accurate SQL ###

SELECT MIN("Year") FROM table_45039 WHERE "Venue" = 'casablanca' AND "Time" = '20.63w'