Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41a53ddb471e212df94ed8a6251f189c906570e4082dc812cd8080077565de23' 
  AND token = 'rbeidYQO7rfGjJ0pLJe1d46dIoUIGatknVrjfcFQiZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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