Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ee3f681007d78b4eea0daa8b9f92466bebc68ad04f9f74a32e3c088b32dcb00' 
  AND token = '72KCimZYwTb6gkoXRW7bYhX1PzGxMEVYVoJYzNJLePM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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