Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3edd8a6cff47c76d2661fb628cfef10f95f37d7abafcbd684cd54e88b62364ec' 
  AND token = 'vmcu0hRX7VN6amcsANHr8S3kHPHx/X4g7xZTfdTjijg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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