Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27123c22cb93cc83f191efb5c28f624519162eef89c231817545cecfdedd9b94' 
  AND token = 'mL8HXeGtBZkcQV3nH+gP86SUgngbqEAK9AdsCUBJCN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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