Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ffa026adb0808cf2400342a24f2e0c4f897f4c49c77cf1f3430cc9f57dbd5e8' 
  AND token = 'WguoUo2V89IYPqiAjhEHec2PvWD4JB5H2iu0HkveriM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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