Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2967c2c8c980886de38a8a1360118173cadf1db6dd773159ab89437254e258f1' 
  AND token = 'Js60Ll/uXdbE31A8T0AeL+IeR7oJryTuyMDQsDPR3AU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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