Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76049067a8ba807a5ed40f3feaedcab4058f0c5955d8a0050a563b8fe983ecf1' 
  AND token = 'AZOo5Zfmn/M+Frialm8LTxFh4AIbe2tWptii4DdCIcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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