Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77faf40700659e702ecf48255c058230c6e97c3f596640f57f51cd83c8b8678a' 
  AND token = 'ApdChysS9Dr5Jo8KcO7+vnQ+NUknJiURf0liE7DHmfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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