Database changed
MariaDB [...]> SELECT seq, (NOW() + INTERVAL seq second) - NOW() df FROM seq_1_to_60;
+-----+------+
| seq | df   |
+-----+------+
|   1 |    1 |
|   2 |    2 |
|   3 |    3 |
|   4 |    4 |
|   5 |    5 |
|   6 |    6 |
|   7 |    7 |
|   8 |    8 |
|   9 |    9 |
|  10 |   10 |
|  11 |   11 |
|  12 |   12 |
|  13 |   13 |
|  14 |   14 |
|  15 |   55 |
|  16 |   56 |
|  17 |   57 |
|  18 |   58 |
|  19 |   59 |
|  20 |   60 |
|  21 |   61 |
|  22 |   62 |
|  23 |   63 |
|  24 |   64 |
|  25 |   65 |
|  26 |   66 |
|  27 |   67 |
|  28 |   68 |
|  29 |   69 |
|  30 |   70 |
|  31 |   71 |
|  32 |   72 |
|  33 |   73 |
|  34 |   74 |
|  35 |   75 |
|  36 |   76 |
|  37 |   77 |
|  38 |   78 |
|  39 |   79 |
|  40 |   80 |
|  41 |   81 |
|  42 |   82 |
|  43 |   83 |
|  44 |   84 |
|  45 |   85 |
|  46 |   86 |
|  47 |   87 |
|  48 |   88 |
|  49 |   89 |
|  50 |   90 |
|  51 |   91 |
|  52 |   92 |
|  53 |   93 |
|  54 |   94 |
|  55 |   95 |
|  56 |   96 |
|  57 |   97 |
|  58 |   98 |
|  59 |   99 |
|  60 |  100 |
+-----+------+
60 rows in set (0.001 sec)

MariaDB [...]> SELECT seq, (NOW() + INTERVAL seq second) - NOW() df FROM seq_1_to_60;
+-----+------+
| seq | df   |
+-----+------+
|   1 |    1 |
|   2 |    2 |
|   3 |    3 |
|   4 |    4 |
|   5 |    5 |
|   6 |    6 |
|   7 |    7 |
|   8 |    8 |
|   9 |    9 |
|  10 |   10 |
|  11 |   11 |
|  12 |   12 |
|  13 |   13 |
|  14 |   14 |
|  15 |   15 |
|  16 |   16 |
|  17 |   17 |
|  18 |   18 |
|  19 |   19 |
|  20 |   20 |
|  21 |   21 |
|  22 |   22 |
|  23 |   23 |
|  24 |   24 |
|  25 |   25 |
|  26 |   26 |
|  27 |   27 |
|  28 |   28 |
|  29 |   29 |
|  30 |   30 |
|  31 |   31 |
|  32 |   32 |
|  33 |   33 |
|  34 |   34 |
|  35 |   35 |
|  36 |   36 |
|  37 |   37 |
|  38 |   38 |
|  39 |   39 |
|  40 |   40 |
|  41 |   41 |
|  42 |   42 |
|  43 |   43 |
|  44 |   44 |
|  45 |   45 |
|  46 |   86 |
|  47 |   87 |
|  48 |   88 |
|  49 |   89 |
|  50 |   90 |
|  51 |   91 |
|  52 |   92 |
|  53 |   93 |
|  54 |   94 |
|  55 |   95 |
|  56 |   96 |
|  57 |   97 |
|  58 |   98 |
|  59 |   99 |
|  60 |  100 |
+-----+------+
60 rows in set (0.000 sec)