Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84ea30076070dbddd0785a66f3c429b6a8b69a16844c08afd76b69ce104c0387' 
  AND token = '8f/C3MNELaYkjsIHoM03M0rH9N8Lelw/nILoMSUFNig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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