SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f097795dce5e215bd4df51cc1783ccb18a7c6d4fcaf86a81251992f37c73181b' 
  AND token = 'dEnz1DxuuopOff44/fBXVEQC7VXBwJxNAmZ6sYFQaDI=' 
  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