SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24e57729f43cbad2d0acacb8c2f49ebf6c80aa0e47a2859fd64d6e438344bb73' 
  AND token = 'dK3888qqQOUux/M9lrzmejGqaICGSIxGa2337tSKanw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00098

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