Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '646daa63981681f28930dc22d3294ceb356bbc37d79eaa6e8f2b65e3c4726c3e' 
  AND token = 'gEWkWvoiBxwWX95YufsoVuKYedbYGyWfjKVz2yU/xIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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