Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8e2df95ac7b2487c6bd4566fbef6a842a6b7445ba4ddf31673c48fbe05200af' 
  AND token = '6oHt/wtUUCptbnYwVPe+YJznd3Sue6v499i0tsKsqxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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