You can call the explain() method on queries to know extra information about the query.
Book::where('name', 'Ruskin Bond')->explain()->dd();
Illuminate\Support\Collection {#5344    all: [        {#15407            +"id": 1,            +"select_type": "SIMPLE",            +"table": "books",            +"partitions": null,            +"type": "ALL",            +"possible_keys": null,            +"key": null,            +"key_len": null,            +"ref": null,            +"rows": 9,            +"filtered": 11.11111164093,            +"Extra": "Using where",        },    ],}
Tip given by @amit_merchant