Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04f0491fe32e2763504f290b6c3c262c02a1a6d0761c2541aad1d3a03a9b4a44' 
  AND token = 'zs/mhu9qXjxcOHWRzwCjJgLYJk7JN/7aRebYtzWDXwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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