Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '800e39cfa6c3bafe7235e56a32cb076901f0e98da8c6b81174fc3b42a988aa6d' 
  AND token = '3gOsGPAauTMtcWRjVkneQ4KekacA7erKHhBOOL+jKeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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