Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab11a4e230de1d9c4c6e57cb4fb0126fa300a9f5f76d39fd5e45b8d844942dd0' 
  AND token = '0tmENdxwI/BQDjGWayiPAwWBcjM6/rt6NeWa6o1nC6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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