Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '535331215d9335106f0cfa593cd6167a59d9e21f5bbefd85a5773d314ad48139' 
  AND token = 'SDiGpQMOrNhhJGCTp7CP2+GL+vqiD9LnjZ95YafI1ZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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