Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5609b06e89af64d9ccae86bc7fcffa9bf6b3bc2daed3ec03c508f4011040eae' 
  AND token = 'eiNNFWQyLvssvQ/ASDqRMQXIyT/S13G82jmsLQWW8/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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