Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a9f1709e88cea4b88957466ef7c7812e5dd2bbb85f7b18990fb0c79d92c6142' 
  AND token = 'ysNIIgci5gefLzzkNM2l4Vxjr9b909KTY5HuM0c3mpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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