Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9d05af4a3ec2ec68df1ae9c5245159ce75886e6b25102caa27537ede5bab2e4' 
  AND token = 'bskQUj3JbuosUwIeJLc0aSgteNjMN8O4mAQq+5uX2kU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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