Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a8ff612540edec434b2bf40f326b5efc773956d9785d16ff1acba7ee893c26f' 
  AND token = 'TK7BaU9qRebhJBW+hb9WmkO+6f9Oda8tGBLdi5QWTVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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