Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '81b399f205669db05396c944b7c35033b9300f931c41af288f2fbb32217423c0' 
  AND token = 'eWn4pxRA/1Ecepv1fE9IkScG/3nbPFnpa/WSKOBNmK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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