Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3732a35b77aad9ee8d2b5334657ced3ecd0a40983503988b1654c523356bc40c' 
  AND token = 'APj5+vmd0jCHFlWiG7cq/KAUFRRCO/uwXY0D9/rZ9Ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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