Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5030c1334bc907732d1729eaaefd6a595530788746e3d987b332972ae92ddb81' 
  AND token = 'bSmOZjlUChcSHqQoTGVoMTuPF9+Bl6jE/m4m6/eNtCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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