Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '725787be050544f7298f1afd59fcc6fc8d3b5f92ff5f686460266ec17bc52e84' 
  AND token = 'J02NZhgBN2jh8mh97aNMgcOPm6FLz4eCLdMvunQBXws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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