Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76b6c6542c9d01d228891530c9496dd2e59a7423c81f3ce7a9e2e2424e8983f1' 
  AND token = 'fa9sCY1wgKfoyoc49vKpVS0Xy214NC7KK06XWN6ahjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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