Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42120cef761853c8ad80ca7c5b1e174c6bb0c7532a50a7ab5cbae25bf5b29420' 
  AND token = 'akpB03KpM+hAI3u5kxJen9Y/TqjU8dFD8VBKH+2U9Yk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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