Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7e7f0d7cac9e666ff3e19e2576313562c35f6fec21821091ecdf31397a8d2b2' 
  AND token = '1i0/Q56UgT+w/D5RTA1llkYB7B6qz+uiE2ZLxK5IA+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}