Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b051da88762aabf5722668516d58fa37d5de3d9395ad265ab692a69c333b9baf' 
  AND token = 'xN4C9LXRSD4VZP9JbZW0ftxXQmYEmJo404T9099hGNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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