Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12e468304e046b3c9642d9590f385902d483d7167342450ce8fc728883c24d06' 
  AND token = 'yHvd56clAb9warzwmpI7f8DT11njnsmTzh4NbgWOjpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00636

JSON explain

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