Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e13833e8de3ccba631f72cf2ccaa2a71b718eca54561acbde68c82d24f834e71' 
  AND token = 'D+qP+Pa0RHAfa13bjmAT+X5Rxvrz+rdSt/otiTb0/bc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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