Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42d2927ba182322e602a9252dae8a94f0382e9155fdee58eddd11073859f6816' 
  AND token = 'wT9xv4K+bURYxTgPiiunQ7GjdWmO9FEFc7CENzYFtxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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