Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba3c8e37cb0e0602d9f572a9766572a285c0419ec1e794b3bda9637b966c8b91' 
  AND token = 'DuclU/COtmq7N6puUv4D4/opyURO6WX/QVlbn2MXh7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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