Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae7c1c57f1f16f5bfc77d9bdd8102e33a13fe4859fd7bdab4fe6159a783f8efc' 
  AND token = 'XBOVZNA/XEGxB86HWIQ+etbXa3BPqn/QtNYfWzJGXgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}