SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd46f01f919c6b186708d2a20e2bc8654ae0e23e397d16fcbea6ab364fe22c30' 
  AND token = 'GtGXY6LJ5WZoC1JtxxdPRCMmHUb/wkCKK/pGGCnVF6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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