Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9ba04a4566001c58ea7cf4d5ed9545767a603eb5c3e4c565014570961154098' 
  AND token = 'a2X28EmP0EhKFtchd3v6ta+wG0JshMQ01nkUls/DOA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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