Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b66c7b8f9ef8059fca1c60e13bb00b5ad32523ece8fcb50ff859223a03e8c187' 
  AND token = 'nGgeY6EVknjYkC4v91P+DLBpgHRPZEt4qNyF0BU5XDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}