SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1066af4368a9c1638bb70c03151a67002fd4923482a556ce648f384f3cb40266' 
  AND token = 'AoTNGBNjF/eBscw1pkf+Id5qcW+Kb8zRsgAvkWM/gYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

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