Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '167383ad160dbc10f7e8671775a4ebd400fba2336be0e5c7f1e5844a08881d93' 
  AND token = 'gY7w6yNo9xhgrR3onCSIJzXQz6Db4i+CD6u8eJDptps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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