Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ee90946bca5e7a54e60b61e5fc840ba291ec914479d4b6108220f2ca8b89474' 
  AND token = 'AqgHnORBIIUos8qQIIPw/U49ViEoN0OfhFa4HeQQk4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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