Storing in array or in fields? Which is better?

Storing in array or in fields? Which is better?

Today I was working on my website and I asked myself a simple question.
Does storing an array with all informations is better than saving those
one in different fields?
For example if I store an ID, a password and a number in one field on the
database in this way
+-------------+----------------------------------------------------------------+
| Field | Value
|
+-------------+----------------------------------------------------------------+
| all |
["1","fa26be19de6bff93f70bc2308434e4a440bbad02","25468684888"] |
+-------------+----------------------------------------------------------------+
Is it better than saving it in this way?
+-------------+------------------------------------------+
| Field | Value |
+-------------+------------------------------------------+
| id | 1 |
| password | fa26be19de6bff93f70bc2308434e4a440bbad02 |
| number | 25468684888 |
+-------------+------------------------------------------+
I think that the first method is faster than the last one because you need
only to SELECT one field and not three or more. What do you think about
it?