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_31271 ( "Pick #" real, "MLS team" text, "Player" text, "Position" text, "Affiliation" text )

### Question ###
What is the pick number for the team toronto fc and affiliation is ldu quito?

### Accurate SQL ###

SELECT MAX("Pick #") FROM table_31271 WHERE "MLS team" = 'Toronto FC' AND "Affiliation" = 'LDU Quito'