SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e4323632b54fd716e26d74912f88c184b0f25506867a2c73d49492675e9a895' 
  AND token = 'wQId0n+asz8fNmUOWW0IiZenaAuVhHt7AVSYbCzsZ8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

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