SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6abac0322d737e88ebf024687c05968386d094b719346a597ab7a4c7af5baa4' 
  AND token = '66rDtSAN1Epl2xd84AsFrj+xIz3Yiae3k1+DYcmBDS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

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