Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfa759641c18d2f917c90d001d8a4dbc5cc94a9798e994b988cebd59a71324dc' 
  AND token = '67ArYan1Kxhq5TxYkJg2za6GuubkzDVX8M+V17aI01Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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