Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '772a4e267f04bb16de04ef0836c0646d9754517b26be030867397d741d31ff14' 
  AND token = 'RnWouCBCJy96VPhJRrwjfhMXzHoNgtrzsP1CsVDMM9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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