SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aba3357792e811c50194712c92bd5eea329e71ed432bc9228fd89c6b66342dcb' 
  AND token = '1+rx/S8zLD9fv0Xp+ZjxgFznyfEB8IHV2u+rxU16mG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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