Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6714eba23a24c6f5aeebb22f4021e44525e77e014f6dd46c27ad83ecb8848825' 
  AND token = 'EzKRYejzuQ09zbUROMznK42NZkle97BPccRv9WLGiVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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