Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '953c558c997e6e0d3829cafb55de5461cdd29dd7a4171b17d6fafebc4d626a65' 
  AND token = 'OBHUeCd5ajxUSFLhfb680SwZvwtK/JxJ8dJCqsc4kCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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