Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd8dd5b031bccb9e9fcb1bf011f948b477038b066117fe5fba57abce26786ea4' 
  AND token = 'hjtLnryf4qjnUvAqylu/rMX5Ou4p/fcM+axq1IxUh6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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