SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '411b11de5d43c1c1ef3c49222a7a1905bfa24bf11a49d707bfb281feb0f88690' 
  AND token = 'NPuYuzr9/SDtjYMBkzPlPU2StciAwsb8kWPgGBNgEKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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