Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8c7da923fb2246257096f5542cb3d606b0ae3a2ed7bfe421cb49eedd6f4eb4ac' 
  AND token = '5b8xK7wmkQK0shzq0iUx5GixEi/7e5CQe7ezq0iKTXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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