Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2fcd851e06b26dd393992dfc3629e35622dbf879e5a0c587e6127963d551868' 
  AND token = '9dMFcvXPjIfoht0JGILYXZJRCpozyzzPx/FdWV25jNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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