SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ffa6213bc33c91e9aae59c7329bb9ecd061adfba7aab2264c3192ab46d5cee0' 
  AND token = 'uVknaein2f+bxP+dXErMedfyRNOjoImX8AREV3MpHLs=' 
  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