Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08f6c5b871797287921e193020bb2d9b8412951e8b5af2ef22727078c27b72e2' 
  AND token = 'pWZP8JQ6T7tuEbPA+M8kZpSi7ldzVIH7Ea2J2Kt1VN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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