Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e3c299d78be8c85bd456b89b2fb78554058edeb8cd33aaa8f67b8690bffb734' 
  AND token = '4UVHCL7wJCDysR64WtBaaTouo1h8H/+kIFetMCYB2QI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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