Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4fbdc43cf27e9f3ab336c7dcc1c2b15bc897b0d3e059103f15fe32b6f50e22d' 
  AND token = 'L9853NphOHVHbDnqZjtqY7G36mundZ+7sVqtL3dUL28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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