SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dea30f32340da5a586894c61ade1fd5c0321fb4aa089af432a7bd6f1b0436add' 
  AND token = 'sRAK/qb68zB+sIF7qlkw9BGWBNCGjR6Lbs1lXNantBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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