Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2749f64046b37a07bde9d59ed3159437a4ea9bd6c586db862f1805b2a696c052' 
  AND token = 'a7UPcnv7yT1By8OoQP9QeLgSpOTGVdLtyp8ZJBSGPdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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