Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdddaed6b10b46eb9b5be04489fba65c6c5c3f01b3dae7a8c457b3fc8a4ecc9b' 
  AND token = 'XNnUJS2MRyol5SQhXaPSIDonpY9U07pn+E9e1wnaAy0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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