Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc334ef90a9b3be2104607c923571a837ec754eb8ac12328de38392cf14d7fa3' 
  AND token = 'FVlZqKe+W/K+aUvcPU9xjpA/tg38+bbyf4B0m7iYMj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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