Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fdb2abf4d9989c1c107fae404fa3931230b547a64b081e67e6f14cfc872b911' 
  AND token = '/f8CaT+DE+YqeoxeQOYgBddrst6c0c6dEV2WL0I9M6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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