Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8842e8afca923f689bcb0960a3dfbc649921265efb538149a512ab88f620a70' 
  AND token = 't8fC3wnS4Xt4sPNI5HtQxJ3olnbaW5ulnPasPJqGgEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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