Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2657916ef15d967c4fcd9c746b909811b177fdccb3e3b5900c69978aa4ac093' 
  AND token = 'bfWXD+eXDa8hFxn2mj2ehs7p2vfKQjRzLTU5HXqrLIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}