SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f65c063f5f6676c3be4b5b5fdcfa143ff1c736940e6057b13fcbaee5526474b' 
  AND token = 'rmGEYCnK4WqnCV6nHrxLfORpr3Nql+BPVlf7NsdQwu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables