SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95cfb4d7337bd50cc69ca986cbdf59b31d0b83cfd6aac32188e981902b108fae' 
  AND token = 'nxZIjZBZQeeyN+dDv7VwEnPxpbED5FK28qRqhdKk96Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

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