Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a4efa93dea5f5c91c5694bf6b3641752fcad7995ca280b18ee0c6f6fec39148f' 
  AND token = '1CyX/lbrstM0wCSwaARYnKLOZHV27EN5R97gJhsck9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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