Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a2e4469dd78da5c58c45264450521242c9008418a8a51012e94448b8cfe57952' 
  AND token = 'fGtiyDSXCJLbWNc60f4xgAKRtcPW7htlwsfMiO2YNJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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