How to Say "unlocked" in Spanish
The Spanish word for “unlocked” is “abierto” — A1 level. This is a very common word in everyday Spanish.

Examples
El banco está abierto de 9 a 5.
The bank is open from 9 to 5.
Por favor, deja la ventana abierta, hace calor.
Please, leave the window open, it's hot.
Encontré el libro abierto sobre la mesa.
I found the book open on the table.
Adjective Agreement
Like many Spanish describing words, 'abierto' must match the item it describes. If the door is feminine, it is 'abierta'. If the books are masculine plural, they are 'abiertos'.
Temporary State (Estar)
You almost always use 'abierto' with the verb 'estar' (to be temporarily) because being open is usually a temporary state that can change (the door can be closed later).
Using 'Ser'
Mistake: “La tienda es abierta.”
Correction: La tienda está abierta. (Using 'estar' shows the current state, while 'ser' would imply being open is a permanent, defining characteristic, which is usually not the case.)
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