Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4775e4fec624a18089c13a4b1092efffb89415037b5df73176deb59d636c9949' 
  AND token = 'fxXbrPmlMueKcS6My58MvMQf2QMR7dAXUo4XMXJy544=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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