Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '198640cb80188f9aeb02244dcb95319cebc50af868d8e5f18015b40625fde87d' 
  AND token = 'z1SlhprCidTjUY5Ux2xZm+mV3jgarHcozBN8eXKW5OY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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