Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4cfbcc486532455a573543f1690cd33e5a2242ed180697530b263ac103a4a9f' 
  AND token = 'YQCxB4olKsxNEg7m4db/PfUTAAxMrftmyp8YkXnAMlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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