Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e31297312992dfbeecb01681c2f3a96eebe1be8352cc04faa9dbca91901608e' 
  AND token = 'Xj+DCDs11Jk+WiKz2b8x+mzPDZz+vZqjGsIx6GJbtng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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