SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ab722622ea2a7d0b2c891f6d7229b8aaa4fb2c49153f84808b40fbe5dbc29c7' 
  AND token = 'EQhss9401DQ8LmDAFXxEDhArFADv+Y/NibiAisMqliM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

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