SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c0e02c1de6ab77a3a6aadd11cee5bf7d70127d6d813d135c1fe3cdef6de7efa' 
  AND token = 'iuAGowzELSlAp6SGzwiVLJ/kV32/6BLRU/ER2CWyujY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

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