Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4a1d1c355069f38441508e252df2f1d619bd7b620dbb7803c379ab7c9058dcc' 
  AND token = '8N302B5HDq+HK8+hn7oa3Ry7o12fJi+L0hJVbkHmBcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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