Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02d3aa87c990a09625b30fe60b50378b14ce8628347c663cdac173d8d5176969' 
  AND token = 'hZwROC7EWVLTqpIXN7+wBrT/EsWTFr2JcekV9t9L3nU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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