Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a845d5984d5e78a19f4926af30bb2fc44489cf461be42b1347206e814e6dc58c' 
  AND token = 'okJrb+TRKkn9msyPHEDIr6k0dc07rL8bH9aoC6ekdXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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