Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52688d325f59bfaa1460bdf397f3602ea02828f639c190d318d9ee4ec898cf1f' 
  AND token = 'T24u2onhC6M+C9D/QGlbjJEijERWD23/ZA8Sbk+ir80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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