Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c69a70777676065f757a05c17526fbd466eb1d21d800d40875c6e4ba6fdc0ed' 
  AND token = 'Gb2W9Qn+0hUDDz2nl8OYtnOFebutriHTOZGiakGCqpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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