Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd07a992ed17c201f5a79c6e9ef1167a9cc03e717e8bffce048bd5645dd53631' 
  AND token = 'Lm8qco0xRv3ye1m6+Wp8N8rrbWl0o8Pe2rYPcty/ve0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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